US5935510A - Method for using recycled glass as a filler in molded plastics - Google Patents
Method for using recycled glass as a filler in molded plastics Download PDFInfo
- Publication number
- US5935510A US5935510A US08/967,718 US96771897A US5935510A US 5935510 A US5935510 A US 5935510A US 96771897 A US96771897 A US 96771897A US 5935510 A US5935510 A US 5935510A
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- United States
- Prior art keywords
- comminuted
- filler
- glass
- resins
- plastic parts
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/26—Scrap or recycled material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/08—Glass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0087—Wear resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/911—Recycling consumer used articles or products
- Y10S264/915—From inorganic material containing articles or products, e.g. hydro-set, cement, plaster, wire, cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/911—Recycling consumer used articles or products
- Y10S264/917—Recycling consumer used articles or products by blow molding material recycled from consumer used article or product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/911—Recycling consumer used articles or products
- Y10S264/921—Recycling consumer used articles or products by injection molding material recycled from consumer used article or product
Definitions
- the present invention relates to the use of comminuted recycled glass as a filler in molded plastics.
- specially manufactured glass has been used as an ingredient in injection and rotational molded plastic parts.
- commercially available glass fibers or whiskers having a length of about 1/4 inch, have been added to plastic to make the product tougher and to improve the yield stress.
- Manufactured glass beads (either solid or hollow) have also been used in injection and rotational molded plastics to improve to toughness and abrasion resistance of the product.
- the manufactured glass fibers and beads cost approximately the same as the plastic used to mold the product.
- the manufactured glass fibers and beads have been used solely to provide desired mechanical properties in the finished plastic product. They have not been used as a filler in plastic to reduce manufacturing costs.
- Such a filler for molded plastic parts is disclosed herein.
- the present invention is directed to the use of comminuted, recycled glass powders as a filler in molded plastic parts.
- Suitable recycled glass powder is preferably free from contaminants, such as grinding compounds, and has non-uniform, rounded edges.
- the glass particles include striations between particle edges which enhance the plastic bond to the glass particles.
- the comminuted recycled glass filler is preferably used with thermoplastic resins commonly used to in injection molding, rotational molding, and blow molding of plastic parts.
- the comminuted recycled glass preferably has a particle size in the range from about 20 mesh to about 200 mesh, and more preferably in the range from 80 to 100 mesh.
- Comminuted recycled glass can be added to plastic resin in concentrations up to 25% by weight, and preferably from 10% to 25% by weight, and most preferably from 15% to 20% by weight. Because comminuted recycled glass costs substantially less than the cost of the raw resin used to manufacture plastic parts, the glass functions as a useful low-cost filler.
- glass filled plastic parts show improved abrasion resistance and flex modulus compared to unfilled parts.
- glass filled plastic parts possess lower impact resistance compared to unfilled parts.
- the amount of glass filler in the plastic part can be tailored to provide the desired abrasion resistance and flex modulus and still maintain acceptable impact resistance.
- the present invention is directed to the use of comminuted recycled glass powders as a filler in molded plastic parts.
- Suitable recycled glass powder can be obtained using the methods and apparatus described in WO 96/23587 entitled “Methods for Recycling Glass and Uses of Recycled Glass” and application Ser. No. 60/048,648 entitled “Apparatus for Comminuting Glass” filed Jun. 5, 1997 (hereinafter "the '648 application”), which are incorporated herein by reference.
- the disclosed method quickly and inexpensively converts waste glass into a form which can be safely handled.
- the process involves "suspended attrition” in which the glass particles are suspended by rotating hammers and are caused to roll within a suspension chamber defined by the rotating hammers and by an adjustable plate.
- the recycled glass according to WO 96/23587 and the '648 application has rounded edges, which is a distinct advantage over conventional ground glass which has extremely sharp edges.
- the comminuted glass disclosed in WO 96/23587 and the '648 application is free from contaminants such as grinding compounds.
- the comminuted recycled glass filler can be used with a variety of different thermoplastics including ABS (acrylonitrile-butadiene-styrene) resins, acrylics, chlorinated polyethers, fluorocarbons, nylons (polyamides), polycarbonates, polyethylenes, polypropylenes, polystyrenes, and vinyls.
- ABS acrylonitrile-butadiene-styrene
- acrylics acrylics
- chlorinated polyethers fluorocarbons
- nylons (polyamides) polycarbonates
- polyethylenes polypropylenes
- polystyrenes polystyrenes
- the term "glass” encompasses all inorganic products which have cooled to a rigid solid without undergoing crystallization.
- the term “glass” is also intended to include other glassy materials including ceramic materials such as porcelain.
- the comminuted recycled glass will typically have a particle size in the range from about 20 mesh to about 200 mesh, although smaller glass particles and powders can be used.
- comminuted recycled glass is intended to include comminuted manufactured glass having rounded edges, regardless of the origin of the glass.
- the comminuted recycled glass may be sprayed or coated with a wetting agent such as TSPP to enhance mixing with the plastic.
- comminuted recycled glass can be used as a filler in molded plastic parts. Recycled glass is very inexpensive, currently costing about $0.15/pound, while typical plastic resin costs between $0.55/pound to $0.90/pound. Comminuted recycled glass can be added to plastic in concentrations up to 25% by weight, and preferably from 10% to 25% by weight, and most preferably from 15% to 20% by weight. Thus, it is possible to substantially reduce the manufacturing cost of plastic parts by using comminuted recycled glass as a filler.
- Molded plastic parts containing glass filler possess improved abrasion resistance compared to unfilled parts.
- glass filled plastic parts possess lower impact resistance compared to unfilled parts. The user must balance the improved abrasion resistance with the lower impact resistance. In practice, one would maximize the glass filler content while maintaining an acceptable impact resistance.
- comminuted recycled glass can be used in a variety of different molding techniques, including injection molding and rotational molding applications.
- the present invention is particularly useful in reducing the manufacturing costs of large rotational molded plastic parts.
- An unexpected advantage of using the recycled comminuted glass as a filler in rotational molded plastic parts is that the oven cycle time can be shortened.
- the shot weight of plastic is placed inside a mold and the mold is rotated inside an oven for a given time period. While in the oven, the plastic melts and coats the inside surface of the mold. After a sufficient time has passed within the oven, the mold is removed from the oven and allowed to cool. It has been found that when a glass filler is used, the required time within the oven can be reduced approximately 20%. While not being bound by theory, it is presently believed that the oven cycle time is reduced because the glass retains the oven heat after the mold is removed from the oven for sufficient time to allow the final outside of the oven.
- a 155 gallon tub is normally rotational molded using a plastic shot weight of from 80 to 90 pounds of high and low density polyethylene and an oven cycle time of about 15 minutes.
- the identical 155 gallon tub can be rotational molded using 68 pounds of plastic and 12 pounds of recycled glass and an oven cycle time of about 12 minutes.
- the oven is a 2.5 million BTU oven consuming large amounts of fuel, a 20% reduction of the oven heating requirements is substantial and unexpected.
- more parts can be manufactured with the same mold in a given amount of time.
- the impact resistance was measured by freezing the molded plastic part to -40° C. and dropping a 10 pound dart on the plastic part. The height at which failure first occurred is reported. It is important to recognize that failure in the impact resistance test does not mean that the plastic part cannot be useful. Plastic parts which will not be subjected to freezing conditions can have very low impact resistance and still be useful.
- High density plastic resins can be used to mold plastic parts. However, if the density of the plastic resin is substantially greater than the density of the comminuted glass particles, the glass tends to "float" in the resin and not disperse well. For instance, when rotational molding with high density plastics, the glass particles tend to migrate to the interior surface of the plastic part.
- comminuted recycled glass can be used as a low cost filler in molded plastic parts. As a result, the manufacturing cost of such molded parts can be substantially lowered.
- the comminuted glass filler can also be used to enhance the abrasion resistance, flex, and tensile strengths of the molded plastic parts.
Abstract
The use of comminuted, recycled glass powders as a filler in molded plastic parts is disclosed. The recycled glass preferably has rounded edges, which is a distinct advantage over conventional ground glass which has extremely sharp edges. Suitable comminuted glass is free from contaminants such as grinding compounds. The comminuted recycled glass filler can be used with a variety of different thermoplastics commonly used to in injection molding, rotational molding, and blow molding of plastic parts.
Description
This application claims the benefit of U.S. Provisional Application Ser. No. 60/036,197 entitled "Method for Using Recycled Glass as a Filler in Molded Plastics" filed Jan. 21, 1997, which application is incorporated herein by reference.
The present invention relates to the use of comminuted recycled glass as a filler in molded plastics.
There is a continuing need in the art of manufacturing plastic parts to reduce the manufacturing costs while maintaining product quality. Many different types of plastic fillers have been proposed for use with molded plastics, but all have failed for one or more reasons. This is particularly true for rotational molded parts.
For instance, organic materials, such as crushed nut shells, produce harmful gasses at typical molding temperatures of 550° F. to 700° F. Sand has also been tried as a filler, but it does not mold well because it does not disperse evenly through out the plastic. Instead, sand tends to migrate to the inside of rotational molded parts. It does not bond well with the plastic and sheds quickly. Sand is also hard on the mixing equipment. Commercially available glass beads and wiskers are often used with injection molded plastics. They have been used with varying degrees of success in rotational molded plastics because the glass does not mix well and simply balls up on the inside of the rotating mold. As used herein, a plastic "filler" is an ingredient which has a cost substantially less than the cost of the plastic used to mold the product.
As mentioned above, specially manufactured glass has been used as an ingredient in injection and rotational molded plastic parts. For instance, commercially available glass fibers or whiskers, having a length of about 1/4 inch, have been added to plastic to make the product tougher and to improve the yield stress. Manufactured glass beads (either solid or hollow) have also been used in injection and rotational molded plastics to improve to toughness and abrasion resistance of the product. However, the manufactured glass fibers and beads cost approximately the same as the plastic used to mold the product. The manufactured glass fibers and beads have been used solely to provide desired mechanical properties in the finished plastic product. They have not been used as a filler in plastic to reduce manufacturing costs.
It would be a significant advancement in the art to provide a true filler for molded plastic parts which can be used to lower the manufacturing cost of molded plastics, particularly rotational molded plastics. It would also be an advancement in the art to provide a filler for molded plastic parts which enhances certain mechanical properties of the part.
Such a filler for molded plastic parts is disclosed herein.
The present invention is directed to the use of comminuted, recycled glass powders as a filler in molded plastic parts. Suitable recycled glass powder is preferably free from contaminants, such as grinding compounds, and has non-uniform, rounded edges. The glass particles include striations between particle edges which enhance the plastic bond to the glass particles. The comminuted recycled glass filler is preferably used with thermoplastic resins commonly used to in injection molding, rotational molding, and blow molding of plastic parts. The comminuted recycled glass preferably has a particle size in the range from about 20 mesh to about 200 mesh, and more preferably in the range from 80 to 100 mesh.
Comminuted recycled glass can be added to plastic resin in concentrations up to 25% by weight, and preferably from 10% to 25% by weight, and most preferably from 15% to 20% by weight. Because comminuted recycled glass costs substantially less than the cost of the raw resin used to manufacture plastic parts, the glass functions as a useful low-cost filler.
It has been found that glass filled plastic parts show improved abrasion resistance and flex modulus compared to unfilled parts. However, glass filled plastic parts possess lower impact resistance compared to unfilled parts. The amount of glass filler in the plastic part can be tailored to provide the desired abrasion resistance and flex modulus and still maintain acceptable impact resistance.
The present invention is directed to the use of comminuted recycled glass powders as a filler in molded plastic parts. Suitable recycled glass powder can be obtained using the methods and apparatus described in WO 96/23587 entitled "Methods for Recycling Glass and Uses of Recycled Glass" and application Ser. No. 60/048,648 entitled "Apparatus for Comminuting Glass" filed Jun. 5, 1997 (hereinafter "the '648 application"), which are incorporated herein by reference. The disclosed method quickly and inexpensively converts waste glass into a form which can be safely handled. The process involves "suspended attrition" in which the glass particles are suspended by rotating hammers and are caused to roll within a suspension chamber defined by the rotating hammers and by an adjustable plate. Importantly, the recycled glass according to WO 96/23587 and the '648 application has rounded edges, which is a distinct advantage over conventional ground glass which has extremely sharp edges. Advantageously, the comminuted glass disclosed in WO 96/23587 and the '648 application is free from contaminants such as grinding compounds.
The comminuted recycled glass filler can be used with a variety of different thermoplastics including ABS (acrylonitrile-butadiene-styrene) resins, acrylics, chlorinated polyethers, fluorocarbons, nylons (polyamides), polycarbonates, polyethylenes, polypropylenes, polystyrenes, and vinyls.
As used herein, the term "glass" encompasses all inorganic products which have cooled to a rigid solid without undergoing crystallization. The term "glass" is also intended to include other glassy materials including ceramic materials such as porcelain. The comminuted recycled glass will typically have a particle size in the range from about 20 mesh to about 200 mesh, although smaller glass particles and powders can be used. As used herein, comminuted recycled glass is intended to include comminuted manufactured glass having rounded edges, regardless of the origin of the glass.
In some applications, the comminuted recycled glass may be sprayed or coated with a wetting agent such as TSPP to enhance mixing with the plastic.
It has been found that comminuted recycled glass can be used as a filler in molded plastic parts. Recycled glass is very inexpensive, currently costing about $0.15/pound, while typical plastic resin costs between $0.55/pound to $0.90/pound. Comminuted recycled glass can be added to plastic in concentrations up to 25% by weight, and preferably from 10% to 25% by weight, and most preferably from 15% to 20% by weight. Thus, it is possible to substantially reduce the manufacturing cost of plastic parts by using comminuted recycled glass as a filler.
Molded plastic parts containing glass filler possess improved abrasion resistance compared to unfilled parts. However, glass filled plastic parts possess lower impact resistance compared to unfilled parts. The user must balance the improved abrasion resistance with the lower impact resistance. In practice, one would maximize the glass filler content while maintaining an acceptable impact resistance.
Advantageously, comminuted recycled glass can be used in a variety of different molding techniques, including injection molding and rotational molding applications. The present invention is particularly useful in reducing the manufacturing costs of large rotational molded plastic parts.
As an added benefit, it has been observed that when larger particle sizes are used, such as about 20 mesh, the glass particles tend to migrate towards the inside surface of large rotational molded parts providing a unique non-skid surface.
An unexpected advantage of using the recycled comminuted glass as a filler in rotational molded plastic parts is that the oven cycle time can be shortened. Normally in rotational molding, the shot weight of plastic is placed inside a mold and the mold is rotated inside an oven for a given time period. While in the oven, the plastic melts and coats the inside surface of the mold. After a sufficient time has passed within the oven, the mold is removed from the oven and allowed to cool. It has been found that when a glass filler is used, the required time within the oven can be reduced approximately 20%. While not being bound by theory, it is presently believed that the oven cycle time is reduced because the glass retains the oven heat after the mold is removed from the oven for sufficient time to allow the final outside of the oven.
As an example, a 155 gallon tub is normally rotational molded using a plastic shot weight of from 80 to 90 pounds of high and low density polyethylene and an oven cycle time of about 15 minutes. The identical 155 gallon tub can be rotational molded using 68 pounds of plastic and 12 pounds of recycled glass and an oven cycle time of about 12 minutes. When one considers that the oven is a 2.5 million BTU oven consuming large amounts of fuel, a 20% reduction of the oven heating requirements is substantial and unexpected. Furthermore, with a quicker oven cycle time, more parts can be manufactured with the same mold in a given amount of time.
A comparison was made of various mechanical properties of molded plastic parts made with virgin plastic resin and with the same plastic resin containing 15% comminuted glass filler and 20% glass filler, by weight. The plastic resin was a linear low density polyethylene. The glass filler had a size in the range from 80 to 100 mesh, and it had rounded edges. Elongation, flex modulus, tensile strength, and impact resistance were measured. The results are reported below:
______________________________________ Mechanical Property Raw Resin 15% Glass 20% Glass ______________________________________ Elongation† 765% 44% 35% Flex Modulus‡ 503 MPa 800 MPa 668 MPa Tensile Strength† 15.5 MPa 15.1 MPa 12.8 MPa Impact Resistance 6 feet 2.5 feet failed ______________________________________ †break at 2 inches/minute. ‡1% secant at 0.05 inches/minute.
The impact resistance was measured by freezing the molded plastic part to -40° C. and dropping a 10 pound dart on the plastic part. The height at which failure first occurred is reported. It is important to recognize that failure in the impact resistance test does not mean that the plastic part cannot be useful. Plastic parts which will not be subjected to freezing conditions can have very low impact resistance and still be useful.
High density plastic resins can be used to mold plastic parts. However, if the density of the plastic resin is substantially greater than the density of the comminuted glass particles, the glass tends to "float" in the resin and not disperse well. For instance, when rotational molding with high density plastics, the glass particles tend to migrate to the interior surface of the plastic part.
From the foregoing, one will appreciate that comminuted recycled glass can be used as a low cost filler in molded plastic parts. As a result, the manufacturing cost of such molded parts can be substantially lowered. The comminuted glass filler can also be used to enhance the abrasion resistance, flex, and tensile strengths of the molded plastic parts.
It should be appreciated that the methods of the present invention are capable of being incorporated in the form of a variety of embodiments, only a few of which have been illustrated and described above. The invention may be embodied in other forms without departing from its essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive and the scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (20)
1. A method for using comminuted, recycled glass as a filler in molded plastic parts comprising:
obtaining a quantity of uncontaminated, comminuted, recycled glass particulate filler having non-uniform, rounded edges which has been comminuted without the use of grinding compounds;
combining the comminuted glass particulate filler with a quantity of thermoplastic resin; and
molding a plastic part with the thermoplastic resin and the comminuted glass particulate filler, wherein the plastic part comprises up to 25% by weight comminuted glass particulate filler.
2. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the plastic part comprises between 10% and 20% by weight comminuted glass particulate filler.
3. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the plastic part comprises between 15% and 20% by weight comminuted glass particulate filler.
4. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the comminuted glass particulate filler has a particle size less than about 20 mesh.
5. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the comminuted glass particulate filler has a particle size in the range from about 20 mesh to about 200 mesh.
6. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the comminuted glass particulate filler has a particle size in the range from about 80 mesh to about 100 mesh.
7. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the thermoplastic resin is selected from ABS (acrylonitrile-butadiene-styrene) resins, acrylic resins, chlorinated polyether resins, fluorocarbon resins, nylon (polyamide) resins, polycarbonate resins, polyethylene resins, polypropylene resins, polystyrene resins, and vinyl resins.
8. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the molding step comprises injection molding.
9. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the molding step comprises rotational molding.
10. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 1, wherein the molding step comprises blow molding.
11. A method for using comminuted, recycled glass as a filler in rotational molded plastic parts comprising:
obtaining a quantity of uncontaminated, comminuted, recycled glass particulate filler having non-uniform, rounded edges which has been comminuted without the use of grinding compounds, wherein the comminuted glass particulate filler has a particle size less than about 20 mesh;
combining the comminuted glass particulate filler with a quantity of thermoplastic resin; and
rotational molding a plastic part with the thermoplastic resin and the comminuted glass particulate filler, wherein the plastic part comprises between 10% and 20% by weight comminuted glass particulate filler.
12. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 11, wherein the plastic part comprises between 15% and 20% by weight comminuted glass particulate filler.
13. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 11, wherein the comminuted glass particulate filler has a particle size in the range from about 20 mesh to about 200 mesh.
14. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 11, wherein the comminuted glass particulate filler has a particle size in the range from about 80 mesh to about 100 mesh.
15. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 11, wherein the thermoplastic resin is selected from ABS (acrylonitrile-butadiene-styrene) resins, acrylic resins, chlorinated polyether resins, fluorocarbon resins, nylon (polyamide) resins, polycarbonate resins, polyethylene resins, polypropylene resins, polystyrene resins, and vinyl resins.
16. A method for using comminuted, recycled glass as a filler in molded plastic parts as defined in claim 11, wherein the comminuted glass particulate filler is obtained using an apparatus which suspends the glass particles and causes them to roll against each other.
17. A method for using recycled glass powder as a filler in molded plastic parts comprising:
obtaining a quantity of uncontaminated, comminuted, recycled glass powder filler having non-uniform rounded edges which has been comminuted without the use of grinding compounds, wherein the glass powder has a size less than about 20 mesh;
combining the comminuted glass powder filler with a quantity of plastic resin; and
molding a plastic part with the plastic resin and the comminuted glass powder filler, wherein the plastic part comprises up to 25% by weight comminuted glass powder filler.
18. A method for using recycled glass powder as defined in claim 17, wherein the comminuted glass powder filler has a particle size in the range from about 20 mesh to about 200 mesh.
19. A method for using recycled glass powder as defined in claim 17, wherein the comminuted glass powder filler has a particle size in the range from about 80 mesh to about 100 mesh.
20. A method for using recycled glass powder as defined in claim 17, wherein the plastic resin is a thermoplastic resin selected from ABS (acrylonitrile-butadiene-styrene) resins, acrylic resins, chlorinated polyether resins, fluorocarbon resins, nylon (polyamide) resins, polycarbonate resins, polyethylene resins, polypropylene resins, polystyrene resins, and vinyl resins.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/967,718 US5935510A (en) | 1997-01-21 | 1997-11-10 | Method for using recycled glass as a filler in molded plastics |
JP53446798A JP2001511085A (en) | 1997-01-21 | 1998-01-12 | Method of using recycled glass as filler in molded plastic |
CA002278799A CA2278799C (en) | 1997-01-21 | 1998-01-12 | Method for using recycled glass as a filler in molded plastics |
PCT/US1998/000566 WO1998031534A1 (en) | 1997-01-21 | 1998-01-12 | Method for using recycled glass as a filler in molded plastics |
AU58221/98A AU723648B2 (en) | 1997-01-21 | 1998-01-12 | Method for using recycled glass as a filler in molded plastics |
EP98901781A EP0964777B1 (en) | 1997-01-21 | 1998-01-12 | Method for using recycled glass as a filler in molded plastics |
AT98901781T ATE281926T1 (en) | 1997-01-21 | 1998-01-12 | METHOD OF USING REUSED GLASS AS FILLER IN MOLDED PLASTIC |
DE69827473T DE69827473D1 (en) | 1997-01-21 | 1998-01-12 | METHOD FOR USING RECYCLED GLASS AS A FILLER IN MOLDED PLASTIC |
NZ337337A NZ337337A (en) | 1997-01-21 | 1998-01-12 | Method for using up to 25% recycled glass as a filler in molded plastics |
US09/264,950 US6284186B1 (en) | 1997-01-21 | 1999-03-09 | Method for using recycled glass as a filler and reinforcement in molded plastics |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3619797P | 1997-01-21 | 1997-01-21 | |
US08/967,718 US5935510A (en) | 1997-01-21 | 1997-11-10 | Method for using recycled glass as a filler in molded plastics |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/264,950 Continuation-In-Part US6284186B1 (en) | 1997-01-21 | 1999-03-09 | Method for using recycled glass as a filler and reinforcement in molded plastics |
Publications (1)
Publication Number | Publication Date |
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US5935510A true US5935510A (en) | 1999-08-10 |
Family
ID=26712929
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/967,718 Expired - Fee Related US5935510A (en) | 1997-01-21 | 1997-11-10 | Method for using recycled glass as a filler in molded plastics |
US09/264,950 Expired - Fee Related US6284186B1 (en) | 1997-01-21 | 1999-03-09 | Method for using recycled glass as a filler and reinforcement in molded plastics |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US09/264,950 Expired - Fee Related US6284186B1 (en) | 1997-01-21 | 1999-03-09 | Method for using recycled glass as a filler and reinforcement in molded plastics |
Country Status (9)
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US (2) | US5935510A (en) |
EP (1) | EP0964777B1 (en) |
JP (1) | JP2001511085A (en) |
AT (1) | ATE281926T1 (en) |
AU (1) | AU723648B2 (en) |
CA (1) | CA2278799C (en) |
DE (1) | DE69827473D1 (en) |
NZ (1) | NZ337337A (en) |
WO (1) | WO1998031534A1 (en) |
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US6284186B1 (en) * | 1997-01-21 | 2001-09-04 | R & J Hansen, L.L.C. | Method for using recycled glass as a filler and reinforcement in molded plastics |
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US20040081819A1 (en) * | 2002-07-08 | 2004-04-29 | Hansen Richard W. | Thermosetting plastic composition |
US20070275224A1 (en) * | 2004-08-20 | 2007-11-29 | Viot Frederic | Motor Vehicle Part Made of Plastics Material Comprising Polypropylene Filled with Glass Fibers |
US20080308659A1 (en) * | 2004-12-16 | 2008-12-18 | Grasso Jr Louis P | Pozzolan Manufactured from Post-Consumer Waste Glass, Products Incorporating the Same, and Methods of Manufacturing the Same |
US20090286902A1 (en) * | 2004-12-16 | 2009-11-19 | Grasso Jr Louis P | Cast Solid Surface Materials Manufactured From Polymers and Post-Consumer Waste Glass |
US20090283018A1 (en) * | 2008-05-15 | 2009-11-19 | Grasso Jr Louis P | White Pozzolan Manufactured from Post-Consumer Waste Glass, Products Incorporating the Same and Methods of Manufacturing the Same |
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US20110000402A1 (en) * | 2009-07-06 | 2011-01-06 | Grasso Jr Louis P | System and Method for Handling Recyclable Materials and Products Manufactured Therefrom |
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US8161711B2 (en) | 2003-04-30 | 2012-04-24 | Lifetime Products, Inc. | Reinforced plastic panels and structures |
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US20150165701A1 (en) * | 2013-12-18 | 2015-06-18 | Gaudreau Environnement Inc. | Method of Manufacturing Paving Slabs |
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Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3597177A (en) * | 1968-07-19 | 1971-08-03 | Potters Bros Inc | Method of producing glass beads |
US3846366A (en) * | 1971-11-22 | 1974-11-05 | R Wallace | Structural material and method |
US3854267A (en) * | 1971-03-15 | 1974-12-17 | Tile Council Of America | Grout compositions |
US3976608A (en) * | 1974-05-07 | 1976-08-24 | Polysar Limited | Filled thermoplastic |
US4013616A (en) * | 1971-11-22 | 1977-03-22 | Wallace Richard A | Mixed polymeric structural material and method |
US4154789A (en) * | 1976-05-25 | 1979-05-15 | Delacoste & Cie, S.A. | Thermoplastic ball and method of manufacturing same |
US4213851A (en) * | 1978-08-11 | 1980-07-22 | Occidental Petroleum Corporation | Flotation separation of glass from a mixture of comminuted inorganic materials using hydrocarbon sulfonates |
US4564491A (en) * | 1982-03-01 | 1986-01-14 | General Motors Corporation | Preparing glass flake reinforced reaction injection molded polymers |
US4796820A (en) * | 1985-08-12 | 1989-01-10 | Richard W Hansen | Portable rock crusher |
US4997485A (en) * | 1988-09-14 | 1991-03-05 | Patrick Lamoni | Aggregate for concrete or a similar building material and a method of producing such aggregate |
US5184781A (en) * | 1992-01-14 | 1993-02-09 | James Andela | Glass pulverizer |
US5523135A (en) * | 1991-10-23 | 1996-06-04 | Polyplastics Co., Ltd. | Blow-moldable polyester resin composition, and blow molded articles thereof |
WO1996023587A1 (en) * | 1995-01-30 | 1996-08-08 | R & J Hansen, L.L.C. | Method for recycling glass and its uses |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846360A (en) * | 1971-12-13 | 1974-11-05 | Phillips Petroleum Co | Base for universal pigment concentrates |
JPH03215016A (en) * | 1990-01-20 | 1991-09-20 | Idemitsu Kosan Co Ltd | Extruding method and device thereof |
US5935510A (en) * | 1997-01-21 | 1999-08-10 | R & J Hansen, L.L.C. | Method for using recycled glass as a filler in molded plastics |
-
1997
- 1997-11-10 US US08/967,718 patent/US5935510A/en not_active Expired - Fee Related
-
1998
- 1998-01-12 WO PCT/US1998/000566 patent/WO1998031534A1/en active IP Right Grant
- 1998-01-12 EP EP98901781A patent/EP0964777B1/en not_active Expired - Lifetime
- 1998-01-12 NZ NZ337337A patent/NZ337337A/en unknown
- 1998-01-12 JP JP53446798A patent/JP2001511085A/en active Pending
- 1998-01-12 AT AT98901781T patent/ATE281926T1/en not_active IP Right Cessation
- 1998-01-12 CA CA002278799A patent/CA2278799C/en not_active Expired - Fee Related
- 1998-01-12 AU AU58221/98A patent/AU723648B2/en not_active Ceased
- 1998-01-12 DE DE69827473T patent/DE69827473D1/en not_active Expired - Lifetime
-
1999
- 1999-03-09 US US09/264,950 patent/US6284186B1/en not_active Expired - Fee Related
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3597177A (en) * | 1968-07-19 | 1971-08-03 | Potters Bros Inc | Method of producing glass beads |
US3854267A (en) * | 1971-03-15 | 1974-12-17 | Tile Council Of America | Grout compositions |
US3846366A (en) * | 1971-11-22 | 1974-11-05 | R Wallace | Structural material and method |
US4013616A (en) * | 1971-11-22 | 1977-03-22 | Wallace Richard A | Mixed polymeric structural material and method |
US3976608A (en) * | 1974-05-07 | 1976-08-24 | Polysar Limited | Filled thermoplastic |
US4154789A (en) * | 1976-05-25 | 1979-05-15 | Delacoste & Cie, S.A. | Thermoplastic ball and method of manufacturing same |
US4213851A (en) * | 1978-08-11 | 1980-07-22 | Occidental Petroleum Corporation | Flotation separation of glass from a mixture of comminuted inorganic materials using hydrocarbon sulfonates |
US4564491A (en) * | 1982-03-01 | 1986-01-14 | General Motors Corporation | Preparing glass flake reinforced reaction injection molded polymers |
US4796820A (en) * | 1985-08-12 | 1989-01-10 | Richard W Hansen | Portable rock crusher |
US4997485A (en) * | 1988-09-14 | 1991-03-05 | Patrick Lamoni | Aggregate for concrete or a similar building material and a method of producing such aggregate |
US5523135A (en) * | 1991-10-23 | 1996-06-04 | Polyplastics Co., Ltd. | Blow-moldable polyester resin composition, and blow molded articles thereof |
US5184781A (en) * | 1992-01-14 | 1993-02-09 | James Andela | Glass pulverizer |
WO1996023587A1 (en) * | 1995-01-30 | 1996-08-08 | R & J Hansen, L.L.C. | Method for recycling glass and its uses |
Non-Patent Citations (6)
Title |
---|
"Markets for Recovered Glass," Office of Solid Waste, U.S. Environmental Protection Agency (OS-305) (Dec. 1992). |
"Summary of Markets for Recovered Glass," Office of Solid Waste, U.S. Environmental Protection Agency, (OS-305) (Dec. 1992). |
Markets for Recovered Glass, Office of Solid Waste, U.S. Environmental Protection Agency (OS 305) (Dec. 1992). * |
Paxton, Kip, "Mining Glass from the Waste Stream," Waste Glass Processing Center--A Tool for Economic Development, Institute of Materials Processing, Michigan Technological University, (www.imp.mtu.edu/newdocs/wgpc.html) (Date unknown). |
Paxton, Kip, Mining Glass from the Waste Stream, Waste Glass Processing Center A Tool for Economic Development, Institute of Materials Processing, Michigan Technological University, (www.imp.mtu.edu/newdocs/wgpc.html) (Date unknown). * |
Summary of Markets for Recovered Glass, Office of Solid Waste, U.S. Environmental Protection Agency, (OS 305) (Dec. 1992). * |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6284186B1 (en) * | 1997-01-21 | 2001-09-04 | R & J Hansen, L.L.C. | Method for using recycled glass as a filler and reinforcement in molded plastics |
FR2832096A1 (en) * | 2001-11-15 | 2003-05-16 | Jean Marc Demeulemeester | Decorative and/or cladding products based on a hardened transparent resin, e.g. for making figurines, funerary plaques, work-tops and tiling, comprise crushed glass as a filler |
US20040081819A1 (en) * | 2002-07-08 | 2004-04-29 | Hansen Richard W. | Thermosetting plastic composition |
US6824832B2 (en) | 2002-07-08 | 2004-11-30 | R&J Hansen, L.L.C. | Thermosetting plastic composition |
US8161711B2 (en) | 2003-04-30 | 2012-04-24 | Lifetime Products, Inc. | Reinforced plastic panels and structures |
US8091289B2 (en) | 2004-03-29 | 2012-01-10 | Lifetime Products, Inc. | Floor for a modular enclosure |
US7926227B2 (en) | 2004-03-29 | 2011-04-19 | Lifetime Products, Inc. | Modular enclosure with living hinges |
US7658038B2 (en) | 2004-03-29 | 2010-02-09 | Lifetime Products, Inc. | System and method for constructing a modular enclosure |
US8132372B2 (en) | 2004-03-29 | 2012-03-13 | Lifetime Products Inc. | System and method for constructing a modular enclosure |
US7770337B2 (en) | 2004-03-29 | 2010-08-10 | Lifetime Products, Inc. | Modular enclosure with offset panels |
US7770334B2 (en) | 2004-03-29 | 2010-08-10 | Lifetime Products, Inc. | Door assembly for a modular enclosure |
US7770339B2 (en) | 2004-03-29 | 2010-08-10 | Lifetime Products, Inc. | Roof system for a modular enclosure |
US7779579B2 (en) | 2004-03-29 | 2010-08-24 | Lifetime Products, Inc. | Packaging system for a modular enclosure |
US7797885B2 (en) | 2004-03-29 | 2010-09-21 | Lifetime Products, Inc. | Modular enclosure |
US8051617B2 (en) | 2004-03-29 | 2011-11-08 | Lifetime Products, Inc. | Modular enclosure |
US20070275224A1 (en) * | 2004-08-20 | 2007-11-29 | Viot Frederic | Motor Vehicle Part Made of Plastics Material Comprising Polypropylene Filled with Glass Fibers |
US7829184B2 (en) * | 2004-08-20 | 2010-11-09 | Compagnie Plastic Onmium | Motor vehicle part made of plastics material comprising polypropylene filled with glass fibers |
US20080308659A1 (en) * | 2004-12-16 | 2008-12-18 | Grasso Jr Louis P | Pozzolan Manufactured from Post-Consumer Waste Glass, Products Incorporating the Same, and Methods of Manufacturing the Same |
US20090286902A1 (en) * | 2004-12-16 | 2009-11-19 | Grasso Jr Louis P | Cast Solid Surface Materials Manufactured From Polymers and Post-Consumer Waste Glass |
US8020347B2 (en) | 2005-05-11 | 2011-09-20 | Lifetime Products, Inc. | Modular enclosure |
US7707783B2 (en) | 2005-05-11 | 2010-05-04 | Lifetime Products, Inc. | Modular enclosure |
US7931220B2 (en) | 2008-05-15 | 2011-04-26 | Empire Resource Recovery, Llc | White pozzolan manufactured from post-consumer waste glass, products incorporating the same and methods of manufacturing the same |
US20090283018A1 (en) * | 2008-05-15 | 2009-11-19 | Grasso Jr Louis P | White Pozzolan Manufactured from Post-Consumer Waste Glass, Products Incorporating the Same and Methods of Manufacturing the Same |
US20110000402A1 (en) * | 2009-07-06 | 2011-01-06 | Grasso Jr Louis P | System and Method for Handling Recyclable Materials and Products Manufactured Therefrom |
CN103181193A (en) * | 2010-10-20 | 2013-06-26 | 松下电器产业株式会社 | Acoustic molded article, speaker using same, and electronic equipment and mobile apparatus using speaker |
EP2632178A1 (en) * | 2010-10-20 | 2013-08-28 | Panasonic Corporation | Acoustic molded article, speaker using same, and electronic equipment and mobile apparatus using speaker |
EP2632178A4 (en) * | 2010-10-20 | 2015-03-25 | Acoustic molded article, speaker using same, and electronic equipment and mobile apparatus using speaker | |
US20150165701A1 (en) * | 2013-12-18 | 2015-06-18 | Gaudreau Environnement Inc. | Method of Manufacturing Paving Slabs |
Also Published As
Publication number | Publication date |
---|---|
EP0964777B1 (en) | 2004-11-10 |
AU723648B2 (en) | 2000-08-31 |
JP2001511085A (en) | 2001-08-07 |
EP0964777A4 (en) | 2003-05-14 |
CA2278799C (en) | 2003-07-29 |
AU5822198A (en) | 1998-08-07 |
NZ337337A (en) | 2001-02-23 |
DE69827473D1 (en) | 2004-12-16 |
US6284186B1 (en) | 2001-09-04 |
EP0964777A1 (en) | 1999-12-22 |
CA2278799A1 (en) | 1998-07-23 |
ATE281926T1 (en) | 2004-11-15 |
WO1998031534A1 (en) | 1998-07-23 |
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